189819963 has 16 divisors (see below), whose sum is σ = 281443840. Its totient is φ = 126443592.

The previous prime is 189819961. The next prime is 189819967. The reversal of 189819963 is 369918981.

189819963 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189819963 - 2¹ = 189819961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189819961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46170 + ... + 50112.

It is an arithmetic number, because the mean of its divisors is an integer number (17590240).

Almost surely, 2^189819963 is an apocalyptic number.

189819963 is a deficient number, since it is larger than the sum of its proper divisors (91623877).

189819963 is a wasteful number, since it uses less digits than its factorization.

189819963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5735 (or 5729 counting only the distinct ones).

The product of its digits is 839808, while the sum is 54.

The square root of 189819963 is about 13777.5165759291. The cubic root of 189819963 is about 574.7080690753.

The spelling of 189819963 in words is "one hundred eighty-nine million, eight hundred nineteen thousand, nine hundred sixty-three".